The proposed circuit on the right illustrates a simple voltage threshold detector, where D1 is a red light-emitting diode (LED). You are required to analyze its behaviour based on the simple constant voltage drop model for both diodes, assuming a voltage drop (Vdo) of 1.8V for a forward-biased diode. You can neglect series resistances in all regions. Furthermore, assume that the Zener diode (Z1) has a breakdown voltage (Vzo) of 10V. 4.1 What voltage does Vin have to reach before there is a current flow (IRI > 0) through R1? 4.2 What voltage must Vin reach before current flows (Ir2 > 0) through R2? 4.3 Write an equation for the current (Izı) through Zj in terms of Vin, R1 and R2 that is valid when Vin is high enough for both diodes to be conducting.

The proposed circuit on the right illustrates a simple voltage threshold detector, where D1 is a red light-emitting diode (LED). You are required to analyze its behaviour based on the simple constant voltage drop model for both diodes, assuming a voltage drop (Vdo) of 1.8V for a forward-biased diode. You can neglect series resistances in all regions. Furthermore, assume that the Zener diode (Z1) has a breakdown voltage (Vzo) of 10V. 4.1 What voltage does Vin have to reach before there is a current flow (IRI > 0) through R1? 4.2 What voltage must Vin reach before current flows (Ir2 > 0) through R2? 4.3 Write an equation for the current (Izı) through Zj in terms of Vin, R1 and R2 that is valid when Vin is high enough for both diodes to be conducting.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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